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US Patent 7010052 - Apparatus and method of CTCM encoding and decoding for a digital communication system
US Patent Issued on March 7, 2006
Estimated Patent Expiration Date:
April 16, 2021Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
April 16, 2021Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractA method of building systematically a multi-dimensional (n, D, L) circular trellis coded modulation (CTCM) encoder with properties of optimal energy efficiency, strong tail biting and maximum minimum distance (dmin) of trellis paths is disclosed. In addition, a communication system for use in a power limited channel application is disclosed comprising a circular trellis coded modulation (CTCM) encoder with permuted state structure for encoding based on a circular trellis path associated with a sequence of digital information bits and a set of simplexes identified for the path from a multi-dimensional signal constellation; a transmitter coupled to said CTCM encoder for transmitting said sequence of channel symbols over said channel; a receiver for receiving a transmission from said transmitter including said sequence of channel symbols and any noise induced therein; and a CTCM decoder coupled to said receiver for decoding the received transmission without knowledge of the starting state of the circular trellis path of the CTCM encoder to recover the sequence of information bits. Apparatus and methods of encoding and decoding are also disclosed utilizing a combination of circular trellis-coded modulation with permuted state structure and simplex signal constellation techniques for use in the digital communication system.Other References
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AssigneeApplicationNo. 09835727 filed on 04/16/2001US Classes:375/265, Trellis encoder or Trellis decoder375/262, Maximum likelihood decoder or viterbi decoder375/341, Maximum likelihood decoder or viterbi decoder714/786, Forward error correction by tree code (e.g., convolutional)714/792, Trellis code708/403, Fourier714/788, Burst error423/446, Diamond714/776, For packet or frame multiplexed data725/67, Transmitter375/348, Intersymbol interference382/232IMAGE COMPRESSION OR CODINGField of Search375/265, Trellis encoder or Trellis decoder375/261, Quadrature amplitude modulation375/234, Fractionally spaced equalizer375/341, Maximum likelihood decoder or viterbi decoder375/259, SYSTEMS USING ALTERNATING OR PULSATING CURRENT375/262, Maximum likelihood decoder or viterbi decoder375/348, Intersymbol interference375/350, By filtering (e.g., digital)375/243, Correcting or reducing quantizing errors375/298, Quadrature amplitude modulation382/232, IMAGE COMPRESSION OR CODING714/792, Trellis code714/786, Forward error correction by tree code (e.g., convolutional)714/795Viterbi decodingExaminersPrimary: Chin, StephenAssistant: Wang, Ted M. Attorney, Agent or FirmUS Patent References4648057, Robust iterative technique for high-resolution spatial processing and spectral estimationIssued on: 03/03/1987 Inventor: Wagstaff , et al.5406570, Method for a maximum likelihood decoding of a convolutional code with decision weighting, and corresponding decoder Issued on: 04/11/1995 Inventor: Berrou, et al.5446747, Error-correction coding method with at least two systematic convolutional codings in parallel, corresponding iterative decoding method, decoding module and decoder Issued on: 08/29/1995 Inventor: Berrou5563897, Method for detecting information bits processed by concatenated block codes Issued on: 10/08/1996 Inventor: Pyndiah, et al.5721746, Optimal soft-output decoder for tail-biting trellis codes Issued on: 02/24/1998 Inventor: Hladik, et al.5907565, Cyclic trellis coded modulation Issued on: 05/25/1999 Inventor: Alamouti5983388, Forward error correction arrangement (FEC) for multipoint to single point communication systems Issued on: 11/09/1999 Inventor: Friedman, et al.6011950, Apparatus and method for using forward error correction setting to enable simultaneous use of multiple modulation systems on terrestrial distribution networks Issued on: 01/04/2000 Inventor: Young6108388, Iterative-structure digital signal reception device, and module and method therefor Issued on: 08/22/2000 Inventor: Douillard, et al.6115436, Non-binary viterbi decoder using butterfly operations Issued on: 09/05/2000 Inventor: Ramesh, et al.6119264Data block convolutional coding device and method, and corresponding decoding method and device Issued on: 09/12/2000 Inventor: Berrou, et al. Foreign Patent References
International ClassH04L 5/12 |
